Table 1 Differences in biomass and changes in biomass among categories when grown under low and high densities according to the results of linear mixed-effect models. Category, density and their interaction are treated as fixed factors, species nested within category is treated as a random factor.

From: High-density native-range species affects the invasive plant Chromolaena odorata more strongly than species from its invasive range

Variable

Category (C)

Density (D)

C*D

Species (Category)

F

P

df

F

P

df

F

P

df

F

P

df

Lg(Aboveground biomass)

0.321

0.810

3

345.593

<0.001

1

14.248

<0.001

3

126.943

<0.001

8

Change in biomass

1.086

0.469

3

0.411

0.524

1

6.133

0.001

3

35.879

<0.001

8